Marine Weather and TidesNorwalk, CT

Version 3.4

What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:45AM

Sunset 4:32PM

Monday November 19, 2018 7:08 PM EST (00:08 UTC)

Moonrise 3:57PM

Moonset 3:34AM

Illumination 90%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

ANZ300 542 Pm Est Mon Nov 19 2018 Synopsis for the long island waters and new york harbor.. A wave of low pressure approaches the waters from the southwest through late tonight, then moves through the waters through Tuesday afternoon. The low moves northeast of the waters Tuesday night as high pressure builds to the west. An arctic front will then pass through Wednesday evening. High pressure then builds in through the end of the week.

Synopsis
Low pressure approaches from the southwest through late tonight,
then moves through the region through Tuesday afternoon. High
pressure builds to the west late Tuesday afternoon through
Tuesday night. An arctic front then sweeps across the tri-
state area Wednesday evening. Cold canadian high pressure then
builds in through the end of the week with the potential for wet
weather over the weekend into early next week.

Near term until 6 am Tuesday morning
Minor updates to the forecast this evening. Patchy fog is being
reported across some locales with less cloud cover this evening,
as winds have lightened along the frontal boundary. Expect that
as rain moves through these visibilities should improve
overnight. Otherwise, the forecast remains on track, with hrrr
seeming to depict the boundary placement best, and other hi-
resolution consensus lending confidence in snow amounts
generally less than an inch for portions of the lower hudson
valley, and no more than 2 inches which is in line with current
probabilistic snowfall forecasts.

An upper longwave trough remains across the eastern us, with
shortwaves rotating through. One wave passed through this
morning with another wave approaching from the ohio valley. This
will be accompanied by a weak surface wave of low pressure. A
weak warm front moved into the region ahead of this wave and the
low level thermal profiles will support all liquid at the onset
this evening. Late tonight forcing increases along the frontal
boundary. This will increase the chances of precipitation. An
with marginal thermal conditions inland, especially at the
higher elevations, there will be a mix of rain and snow, going
over to all snow toward Tuesday morning as the lower levels
cool. The best forcing will be quickly moving to the east late
tonight into Tuesday morning and the precipitation will be
ending Tuesday morning across the western zones and as the low
begins to deepen. Leaned toward the cooler NAM even through
guidance fairly similar. So,at this time may see up to an inch
of snow across the higher inland elevations before the
precipitation ends.

Short term 6 am Tuesday morning through Tuesday night
Low level frontal forcing will be moving through the eastern
zones by late in the morning as the low, which will likely be
across southeastern connecticut and eastern long island, begins
to deepen. So will be ending precipitation through the afternoon
as the low deepens and moves along the southern new england
coast. Precipitation will be lowering and ending as the colder
air wraps in behind the low Tuesday afternoon, so not expecting

a transition to snow across the eastern zones.

The upper eastern trough will remain as higher pressure begins
to build to the west Tuesday night, so will be a little slower
for clouds to clear than guidance is indicating.

Long term Wednesday through Monday
A highly amplified, yet progressive upper air pattern will
continue through the period. Short-term climate signals all
pointing toward an unseasonably cold and active period with the
mean upper trough over eastern north america.

An anomalous upper trough descends southward across eastern
canada and the northeast at the onset of the period, sending an
arctic cold front across the tri-state area during the late
afternoon early evening hours Wednesday. The airmass to follow
Wednesday night through Thursday will be record cold for most of
the climate sites with readings 20 to 25 degrees below normal.

Thereafter, temperatures will rebound to near normal over the
weekend.

Global models over the weekend diverge on the amount of phasing
of the two branches of the polar jet east of the mississippi
river valley as pacific energy races across the lower 48. The
ecmwf is the closest to the phasing of the two streams as a
negatively tilted upper trough approaches Saturday into Saturday
night. While with all scenarios the airmass is warming enough
with a deep-layered e-se flow, rainfall amounts are
significantly varied based on the amount of forcing. This is
followed by a similar system early next week in which there is
better agreement of a closed upper low moving across the ohio
valley. Regardless, there are enough complexities at this point
in time to not be too specific with forecast impacts.

Aviation 00z Tuesday through Saturday MVFR will work back into the area this evening as a frontal
boundary pushes through the region. Overnight ifr lifr are
possible once again, especially for coastal terminals. Light
rain will move across the terminals overnight and Tuesday
morning, possibly mixed with some -sn at kswf. Conditions likely
remain ifr or lower for tomorrow morning's push coastal tafs.

Weather Map and Satellite Images

(on/off) &nbspHelpWeather MapGOES Local Image of EDITNOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.Link to LoopOther links:
Northern PacificContential USFull GOES-East

Wind Forecast for New York City/Upton, NY (19,4,5,8)

Disclaimer:The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.